The demands that the surrogate mother, also called gestational carrier, may make must be stipulated in the surrogacy contract. In any case, it is recommended to follow the doctor's indications, because as a specialist, it is the doctor who has studied the characteristics of her menstrual cycle and her endometrium. Therefore, he will know which treatment offers the greatest probability of pregnancy.
Read the full article on: Endometrium Preparation for Embryo Transfer: How does it work? ( 66).